get.c

linux 纯C(geturl)获取网页原码并保留在本地

#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>

#define BUF_SIZ 4096

int main( int argc, char **argv) {
	char buff[BUF_SIZ];
	char msg[BUF_SIZ];
	int s;
	fd_set sockid_readable;
	struct sockaddr_in server;
	struct hostent *host_info;
	unsigned long addr;
/* Ip Adresse holen*/
	host_info = gethostbyname("www.2duche.com");
	memcpy( (char *)&server.sin_addr,
	 host_info->h_addr, host_info->h_length );
	server.sin_family = AF_INET;
/*Http Port 80.*/
	server.sin_port = htons(80);
	printf("Createing Socket:...");
/*Socket erstellen.*/
	s = socket(AF_INET, SOCK_STREAM, 0);
	if (s <= 0) {
		printf("Error.\n");
		return EXIT_SUCCESS;
	} else {
		printf("Ok.\n");
	}

	printf("Connecting with server:...");
	char result;
/*Mit dem Server verbinden.*/
	result = connect(s,(struct sockaddr*)&server,sizeof(server));
	if (result == -1) {
		printf("Error.\n");
		return EXIT_SUCCESS;
	} else {
		printf("Ok.\n");
	}
/*HTTP 1.1 Anfrage:*/
	//char send[] = "GET /test.html HTTP/1.1\r\nHost:www.2duche.com\r\n\r\n";
	char send[] = "GET /test.html HTTP/1.1\r\nAccept: */*\r\nAccept-Language: zh-cn\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)\r\nHost: www.2duche.com\r\nConnection: Close\r\n\r\n";
	strcat(send, "\n");
/*HTTP 1.1 Anfrage senden*/
	printf("Sending Socket:...");
	if (0 <= write(s, send, strlen(send))) {
		printf("Ok.\n");
	} else {
		printf("Error.\n");
		return EXIT_SUCCESS;
	}
/*Datei vom Server empfangen.*/
	printf("Getting file:...");
	int count = recv(s, buff, BUF_SIZ, 0);
	while(count>0){
/*'\0' an die empfangene Variable anhängen*/
		buff[count] = '\0';
/*Ergebnis ausgeben*/
		printf("Ergebnis des Servers: ====================\n%s\n", buff);
		count = recv(s, buff, BUF_SIZ, 0);
	}
	close(s);
	printf("\r\n\r\n Socket is closed");
	return EXIT_SUCCESS;		
}